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Category Archives: Seeders

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The Problem: As part of any LDV and PIV measurements seeding particles need to be introduced into the flow. For large size wind-tunnels the volume of air going through them is large and “off the shelf” seeding generators cannot produce the density of seeding required. Smoke generators are the only devices that can generate large quantity of seeding and produce sub-micron particles.
In LDV applications the small aperture of the receiving optics combined with the small size of the smoke particles produces weak signals and low data rates. In PIV applications the interrogation areas in large wind tunnels are required to be large and smoke particles are not ideal because they produce weak signals (or necessitate the use of high power lasers).... Read more